45
Insulation
Due to our policy of continuous product innovation, some specifications may change without notification.
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INSULATION
1. Typical Conditioned Location
A building plenum or space that contains conditioned air that does not exceed 80°F DB.
2. Special Conditioned Location
1. When the location is air conditioned, but there is severe temperature/humidity difference due to high ceilings.
• Church, auditorium, theater, lobby, etc.
2. When the location is air conditioned, but internal temperature/humidity are high.
• Bathroom, swimming pool, locker room, etc.
3. Typical Unconditioned Location
An unconditioned space inside a building.
Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM) Insulation Wall Thickness Requirements
4. Special Unconditioned Location: If conditions 1 and 2 below are present.
1. An unconditioned space or plenum of a building.
2. An area where there is an elevated humidity level.
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Air-conditioned location
Non-air conditioned location
1. Typical Conditioned
Location
2. Special Conditioned
Location
3. Typical Unconditioned
Location
4. Special Unconditioned
Location
Liquid pipe
ø1/4 inch
>1/2 inches
>1/2 inches
>1/2 inches
>1/2 inches
ø3/8 inch
¡LQFK
>1/2 inches
>1/2 inches
>1/2 inches
>1/2 inches
Vapor pipe
ø3/8 inch
>1/2 inches
>3/4 inches
>3/4 inches
>1 inch
ø1/2 inch
ø5/8 inch
ø3/4 inch
ø7/8 inch
ø1 inch
ø1-1/8 inches
>3/4 inches
ø1-1/4 inches
>1 inch
>1 inch
ø1-3/8 inches
ø1-1/2 inches
ø1-3/4 inches
Table 20: Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements.
1
•
Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature fluctuations.
• Always properly insulate the piping. Insufficient insulation will result in condensation, reduced heating/cooling performance, etc. Also, if the
pipes aren’t insulated properly, condensation could potentially cause damage to building finishes. Pay special attention to insulating the
pipes installed in the ceiling plenum.
• Fully insulate the piping connections.
• Follow locals codes and the designer’s instructions when selecting ethylene propylene diene methylene (EPDM) insulation wall thickness.
1
The thickness of the above insulation material is based on heat conductivity of 0.61 Btu/in/h/ft
2
)
5. Additional Insulation for Indoor Units May be Required in Humid Environments.
The air conditioner factory insulation has been tested according to “ISO Conditions with Mist,” and it satisfies the requirements. If the system
has been operating for a long time in a high humidity environment (dew point temperature: more than 73°F), condensate is likely to form. If
this happens, install 3/8 inch thick EPDM insulation that is plenum-rated with a heat-resistance factor of more than 248°F.
